Matches in SemOpenAlex for { <https://semopenalex.org/work/W2974667588> ?p ?o ?g. }
- W2974667588 abstract "Abstract Domain composition and interfacial structure are critical factors in organic photovoltaic performance. Here, we report neutron reflectivity, grazing-incidence X-ray diffraction and atomic force microscopy measurements of polymer/fullerene thin-films to test a hypothesis that these partially miscible blends rapidly develop composition profiles consisting of co-existing phases in liquid-liquid equilibrium. We study a range of polymer molecular weights between 2 and 300 kg mol −1 , annealing temperatures between 120 and 170 o C, and timescales up to 10 min, yielding over 50 distinct measurement conditions. Model bilayers of fullerene-derivatives and polystyrene enable a rigorous examination of theoretical predictions of the effect of polymer mass and interaction parameter on the compositions, ϕ, and interfacial width, w , of the coexistent phases. We independently measure ϕ and w and find that both Flory-Huggins mean-field-theory and key aspects of self-consistent-field-theory are remarkably consistent with experiment. Our findings pave the way for predictive composition and interface design in organic photovoltaics based on simple experimental measurements and equilibrium thermodynamic theory." @default.
- W2974667588 created "2019-09-26" @default.
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- W2974667588 date "2019-09-16" @default.
- W2974667588 modified "2023-10-10" @default.
- W2974667588 title "Interfacial width and phase equilibrium in polymer-fullerene thin-films" @default.
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- W2974667588 doi "https://doi.org/10.1038/s42005-019-0211-z" @default.
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